Drawbench



I Patented Apr. 4, 1922.

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INV'EN TGR W. BAHK.

DRAWBENCH. APPLICATION FILED Nov. 2e. 1920.

1mm@ Apr; 4, 1922.

3 SHEETS-SHEET 3.

UNITED. STATES PATENT OFFICE.

WILLIAM Bann, or n LYRIA, O Igiro, nssIGNon 'ro NATIONAL 'MTBE COMPANY, or rl'lrsnnnen, rENNsYLvANIn, e CORPORATION or Nnyvmilena.

nnAwBnNoE.

Specicaton of Letters Patcnt. B34159511 ted Ap1-, 4, V1922,

Application led November 26, 1920. Serial No. 426,494.

Y 10 all whom l? may eminem:

Be it known that I, VILLIAM Benn, a citizen of the United States, and resident of Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Drawbenches, of which the following is a specification.

My invention relates to the construction and operation of the draw benches used in the manufacture of buttweld pipes and tubes, and more particularly to draw benches of the swinging type, in which the rear end of the bench is pivoted and the front or furnace end thereof swings in a horizontal plane across the'ividth of the opening or doorway in the end of the skelp heating furnace through which the heated 4skelp are withdrawn in the welding operations.v

One object of my invention is the provision of -a draw bench'havingnovel means for handling and conveying the pipes or tubes-after completion fof the welding operations, in delivering the welded pipes or tubes endwise to the'sizing rolls.`

Another object of the invention is to provide a swinging draw bench, having the novel construction, arrangements, and combination of-partsfshown by the drawings and described I in detail hereinafter, 'and particularly A pointed out in the appended claims.

The invention consists in the brovision 1 as an integral part ofthe swinging draw bench, of means for receiving andconveyng the welded pipes to the delivery rollers of the feed table leading to the entering side of the pipe mill sizing rolls which the welded pipes are made .truly cylindrical and of uniform diameter. i

Referring now to the drawings forming part of this specification, Figure 1 is a plan, showing a swinging draw bench constructed and arranged in accordance with my invention;

Figure 2 is a side elevation of the draw bench' shown in Figure 1.

Figur@ 3 is a sectional end elevation, 011 a larger sca-1e, showingfdetails 'in the con struction ofthe draw bench of Figures 1 and `2, the Section being taken on the line Ill- III of Figure 1 .Figure 4 is a Plan, ShOWiIlg details 111. `th@ construction of fthe draw chain and tongs hOOlS, forming pflrt'f ythe draw bench of Figure 5 is a side elevation of the draw chain and tongs hook illustrated in Figure 4.

In the accompanyingV drawings, the numeral 2, in a general way, designates a swing- Ying draw bench which is pivoted on and supported at its rear end by the pivot pin 3 on the base or standard 4t'. The draw bench 2 extends lengthwise in front of a skelp heating furnace 5, and has its front or swinging end positioned` adjacent to ,the doorway or opening 6 in the discharge end of the furnace, through which the. heated skelp are pulled by the endless traveling draw chain 7 mounted on the v,c lraw bench The draw bench is supported on wheeled trucks 8 located at intervals inits leng,t h the wheels 9 of the truck traveling ron tracks yon the yInill, floorr 1 0. i

The endless'draiv chain 7 extends around the idler sprocket wheelll on the frontl or swinging end of the draw bench, and the chain driving sprocket wheel V12 at the rear. or pivot end ofthe draw` bench, the 4 top run of the draw chain being supported on theguideway on Ythe upper face o f the draw bench. The lower side' of the draw chain is supported by anti-friction rollers, and the guides 14, so as: to always be'clear of the mill floor 10. (See Figure 3). i

In the apparatus shown, the dra-w `chain is provided at suitable intervals in, itsy length, with tivo or more forked hooks 15 which automatically engage thebutton on the end of the tongs by which the pipe skelp are attached to the draw chain in the pipe welding operations.

In another and older form of draw bench, the hooks A15 are omitted, a manually operated hook or monkey being employed to connect the tongs to the draw chain in' the successive s kelp drawing operations.

The sprocketwheel 12 at the pivoted end of the draw'bench 2 is driven throughrel-- ducing gears 16 and 17 by the electric driving motor18 located alongside and at the receiving end of the roller conveyer table 19 which leads to the pipe ork tube sizing rolls.

Also mounted on the wheeled trucks 8 forming the conveyer for the draw bench y2, is a pipe conveyer, designated generally by thel numeral 2 0, forming part of my proved apparatus. As shown, this conveyer has an endless @haie 2l which estende @r9-1,1 l

'an idler wheel 22 near the furnace end of the draw bench, Vand a driving sprocket wheel 23 adj acentto the AVpivotedend thereof. The upper run'of this endless conveyer chain 21 travels in the guide-way 24 `l'orming'the.

track vor conveyer chain support, and the lower side of.- the chain is supported at in-y `and the reducing gearing being mounted'on `the side of the conveyer 20 so as to `rnove or swing sidewise with the draw bench.

The u per face. of the conveyer chain 21 is at a ower level than the upper face of the draw chain 7, and the series of inclined ways 31` on which the welded pipes roll from the chain 7 to the conveyer chain21; tie the conveyor 20 to the draw bench (see Figure a).

he conveyer 20 is "arranged to deliver' `the welded pipe end'wise to the end of the, "rollerconveyer table 19 on which the welded pipes are transferred to the sizing rolls (not shown) by which these pipes are sized and made truly cylindrical. The rollers of :this `table 19 are positively driven through v`bevel gears 32 and 33 bythe line shaft 34; i'

across the width of the doorway inthe endv of the skelp heating furnace, in the :usual known manner, by a fluid pressure cylinder lated andlcontrolled by a manually operated valve, notv shown, which is located in anyV 351 the outer end of its piston rod 36 being pivotally connected to one side of the drawV bench,l as is shown in Figure 1. The supply of fluid pressure to the cylinder 35 is regusuitable position.

The draw bench 2 is provided onjthe weldersside thereof, with the usual ,trough 37 in which the tongs 'are returnedffrorn theepivoted end of the bench into .position to be grasped and again used by the Welder.`

metaliplate or arm 38 is mounted v.on the front end oflthedraw vbench and has .itswfreegend upturned .and'provided withk a notch"`38 forming a guide forethetongs, thus insuring `that the button end of the tongs-will lie central with the draw chain 7 `and "therefore befcaught by the hooksgl:

' of l;lie ;l iain.I4 y

In; the operatlon of my improved draw benchythe Welder connects a pair of pipe to` tothe end of a heated skelp lying weld y u l'behind the stop on the draw bench, then WiLtMnQLhe furnaces," and after threading a! bell over the A tongs,4 into position positions the reins Vof the tongs immediately above the traveling draw chain 7. at the furnace end of the draw, bench. forked tongs hook on the traveling draw chain. passes around the idler sprocket wheel 11 to the upper side of the draw bench, its tines automatically engagewith the button on the end of thetongs reins,

land pullsthertongs and the heated skelp attached thereto through the welding bell on the front or furnace end of the `draw bench 2. After the welded skel is pulled entirely through thel welding ic and is thereby `formed into a welded pipe, the

chain 21. This chain, no matterwhat the` position of the front or swingingend of the draw bench, will then deliver the welded pipe endwiseto the roller table 19 by which the pipe is then transferred to the pipe millV sizing rolls.

, The above described operations kare then` repeated in makingfthe successively Vweliled pipes.

As the Y The advantages "ofrmy" invention," which will be apparent' to those skilled in the art,"` arise from the combjna'tionwith the swing# ing draw bench,o`f means forming a-pipe The front end'of the draw bench is moved conveyer whichmoves'with the Vdraw bench and receives thefweld'ed pipes, andwhichQ- inany of the angular `positions Vinto which livers the pipes endwise as received from the draw' bench to thexed roller table by which the pipes aregtransferred tothefsiz# ing rolls.V The apparatus is simple and very compact, and is arranged -to handle the'pipe without delays,V so that the welding opera? tions are facilitated.l

Many modifications in the "construction and arrangement of theapparatusmay be made V'without departingfrom thespirit of my invention as l defined in the appended claims. y *l L 1. A draw bench for making buttweld pi es or tubes, comprisinga pivoted horizonte' ly swinging carriage having* a traveling draw" chain thereon for drawing heated skelp a heating furnace through "a welding bell,

` anendlessgpositivelydriven conveyer chain on 'said carriagebelow and paralleling said draw chain for conveying the welded pipe lengthwiseV away `from saiddraw chain, in-

ict

clined ways ^extending` between said :draw

chain' and yco'nveyer chain on which "the `welded Apipes or tubes aretransferred side- Wise by gravity from said drew chain to said Conveyer chain, and means mounted on said carriage for driving said conveyei chain.

2. A draw bench for making buttweld pipes oi tubes, comprising a pivoted horizontally swinging ceriiage having e traveling draw chain thereon for drawing heated skelp from a heating furnace through a Welded bell, en endless, positively driven conveyer chain on said carriage alongside said draw chain for conveying the Welded pipe lengthwise away from said draw chain, said conveyei' chain being lower than said draw Chain, and means extending between said draw chain and conveyei chain on which the Welded pipes and tubes are transferred sideivise by gravity from said draw chain to said conveyei chain.

In testimony whereof, I have hereunto set my hand.

WILLIAM BAR-K. 

